“It could repeat the devastating losses of Elm-feeding species that we saw as a result of Dutch Elm Disease during the 1970s.”

Butterflies have suffered before from the spread of tree diseases. Dutch Elm disease in the 1970s it caused a massive decline in elm feeding species like the White-letter Hairstreak, which declined by over 70% and badly affected rare moths like the White-spotted Pinion. (now a UK BAP Priority species).

Butterfly Conservation is asking for members to be vigilant for the disease and report any suspected cases to the Forestry Commission.